Small connecting lever insulated overhead working truck cantilever crane and control system thereof

Abstract

The invention discloses a small connecting lever insulated overhead working truck cantilever crane and a control system thereof. A platform power supply control circuit is adopted for realizing long-time continuous platform power supply to provide a platform operation control power supply, so that the problem concerned with platform power supply is solved. A rotary table main control proportionalvalve group for controlling main actions of a cantilever crane is adopted by a cantilever crane main action control circuit to realize proportional control of all the main actions of the cantilever crane, and all the main actions can be taken separately or in a combined manner. One proportional valve in the rotary table main control proportional valve group is adopted by a cantilever crane platform auxiliary action control circuit, so that all the auxiliary actions of up to 8 platforms can be controlled. A simple differential connection manner of a shuttle valve is adopted by telescopic actions of the cantilever crane, so that the cantilever crane can extend out rapidly without accelerating. Distributed optimal distribution is adopted for the valve group, so that the load of the platform occupied by the valve group is small, an insulating cantilever has less pipelines and a small diameter, an insulating cantilever towing chain pipeline is easy in distribution, the pipeline pressure loss is low, and the valve group is prevented from leaking oil easily.

Description

technical field [0001] The invention relates to an arm frame of an aerial work vehicle, in particular to an arm frame of a small crank insulated aerial work vehicle and a control system thereof, belonging to the technical field of aerial work vehicles. Background technique [0002] The aerial work vehicle is a special special vehicle for transporting staff and equipment to the high altitude to install, maintain and clean the equipment located at high altitude, and the insulated aerial work vehicle, as a special aerial work vehicle capable of live work, is widely used in Widely used in electric power, telecommunications and other industries. During the construction work, when the wires distributed by the two-wire line are away from buildings or rivers on the side of the road, no matter whether it is a straight telescopic arm type or a folding arm type live aerial work vehicle, it cannot be repaired, especially in many occasions. Even the construction occasions in the power i...

AI Technical Summary

Problems solved by technology

During the construction work, when the wires distributed by the two-wire line are away from buildings or rivers on the side of the road, no matter whether it is a straight telescopic arm type or a folding arm type live aerial work vehicle, it cannot be repaired, especially in many occasions. Even the construction occasions in the power industry cannot meet the customer's requirements, so it is necessary to add a section of insulating arm that can rotate horizontally to increase the horizontal working area

[0003] The existing insulated aerial work vehicles all adopt full hydraulic control system. Since the insulated aerial work vehicles have many movements, and the platform is the main operating platform, it is required that all the movements of the boom and platform on the vehicle must be operated and controlled through the platform. The disadvantages of the control method are: 1) As many as twelve manual multi-way reversing valve groups are installed on the platform, which leads to the installation of heavy hydraulic valve groups on the platform, which takes up a lot of space, and the weight of the valve group itself leads to a large platform occupation Load; 2), each action of the boom can only be manually operated by a mechanical handle, and the operation ratio of the action is poor, and it is not easy to control; 3), the flow required for some actions of the boom platform is very small, and its speed can only be controlled by throttling , the system is prone to heat; 4), the pipeline in the insulating arm is long, the pressure loss is large, the system is prone to heat, and the valve group is prone to oil leakage; 5), there are many pipelines in the arm, and some pipelines are thick. 6) Some auxiliary actions of the platform, such as boom rotation, even if the

Images